Chapter 4 An overview of recent developments for BiSb Alloys

摘要: Publisher Summary This chapter reviews the recent developments for bismuth–antimony (Bi–Sb) alloys. It describes main physical properties of Bi–Sb alloys and their synthesis. The discusses salient results pertaining to thermoelectric both single crystalline polycrystalline materials. focuses on in Bi-rich region. Transport are only described qualitatively, because band structure is strongly correlated antimony content temperature. Although thermomagnetic effects present considerable interest solid solutions, zero-field coefficients. summarizes basic features pure elements pertinent understanding transport properties. small distortion from simple cubic lattice induces that bismuth semimetals characterized by a overlap fifth sixth bands, leading presence equal number electrons ( n ) holes p at all temperatures. In isotropic monovalent metals or extrinsic semiconductors, where one type cartier present, carrier density mobility μ may be easily experimentally determined using Hall coefficient, R H. knowledge temperature range 80–200 K greatest point view use devices. alloys, thermal conductivity λ principally sum two terms: an electronic contribution E (including unipolar bipolar terms) associated with L .